navigation system TOYOTA SEQUOIA 2001 Service User Guide

I28606
Radio Receiver Assy
Wire Harness View:
TX±
TX+
R4
I28292TX+
Radio and Navigation Assy:
TX±R30
I28752
Stereo Component Amplifier Assy :
S10
TX± TX+
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2065
2259 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check harness and connector (Radio receiver assy / radio and navigation assy ±
Stereo component amplifier assy).
PREPARATION:
Disconnect the radio receiver assy or radio and navigation assy
and stereo component amplifier assy connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Radio Receiver Assy:
Symbol
(Tester connection)ConditionSpecified condition
TX+ (R4±5) ±
TX+ (S10±20)AlwaysBelow 1 W
TX± (R4±15) ±
TX± (S10±19)AlwaysBelow 1 W
TX+ (R4±5) ± Body
groundAlways10 kW or higher
TX± (R4±15) ± Body
groundAlways10 kW or higher
Radio And Navigation Assy:
Symbol
(Tester connection)ConditionSpecified condition
TX+ (R30±5) ±
TX+ (S10±20)AlwaysBelow 1 W
TX± (R30±15) ±
TX± (S10±19)AlwaysBelow 1 W
TX+ (R30±5) ± Body
groundAlways10 kW or higher
TX± (R30±15) ± Body
groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Replace rear seat audio controller.

I28377
w/o Navigation System:
R19
Radio Receiver AssyRear Seat Audio Controller
RMUT
ID2 19
R2411
RMU11
LG R±W
I28377
w/ Navigation System:
R27
Radio and Navigation AssyRear Seat Audio Controller
RMUT
ID2 19
R2411
RMUT11
LG R±W DI±2066
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2260 Author: Date:
2005 SEQUOIA (RM1146U)
Mute signal circuit (to rear seat audio controller)
CIRCUIT DESCRIPTION
This circuit sends the signal to the rear seat audio controller to mute the noise. Because of that, the noise
produced by changing the sound source ceases.
If there is an open in the circuit, noise can be heard from the speaker when changing the sound source.
If there is a short in the circuit, even though the rear seat audio controller is normal, no sound or only extreme-
ly small sound can be produced.
WIRING DIAGRAM
DIDAO±01

I28336
RMUT
R24Wire Harness View:
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2067
2261 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect rear seat audio controller.
PREPARATION:
Make sure that the rear seat audio controller connector is con-
nected.
CHECK:
Measure the voltage according to the value in the table below.
OK:
Symbol
(Tester connection)ConditionSpecification
RMUT (R24±11) ±Body
groundTurn ignition switch to
ACC, Audio system is
playing "Changing mode
Above 3.5 V " Below 1 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±2050).
NG
2 Check system.
CHECK:
Check whether the vehicle is equipped with a navigation system or not.
RESULT:
w/o NavigationGo to step A
w/ NavigationGo to step B
B Go to step 5.
A

I28337
R24
RMUT
Rear Seat Audio Controller
Wire Harness View:
I28299RMU
Radio and Navigation Assy
Wire Harness View:
R27
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2069
2263 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check harness and connector (Radio and navigation assy ± Rear seat audio con-
troller).
PREPARATION:
Disconnect the R24 and R27 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
RMUT (R24±11) ±
RMU (R27±19)AlwaysBelow 1 W
RMUT (R24±11) ± Body
groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
6 Replace rear seat audio controller.
CHECK:
Replace the rear seat audio controller and check if it operates normally.
OK:
The function returns to normal.
OK Normal operation.
NG
Replace radio and navigation assy.

I28600
w/ Navigation System:
Radio and Navigation AssyRear Seat Audio Controller
R±R+
ID2 15
9
W W R27
R±R± 16
R248
W G
R±L+ 17
R247
W B
R±L± 18
R24
W
R
SG1 14
R24106 9
8
7
106 R±R+
R±R±
R±L+
R±L±
RSLD
(Shielded)
(Shielded) ID2
ID2
ID2
ID2R24
R27
R27
R27
R27 DI±2070
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2264 Author: Date:
2005 SEQUOIA (RM1146U)
Sound signal circuit (Radio receiver assy / radio and navigation
assy ± rear seat audio controller)
CIRCUIT DESCRIPTION
The radio receiver assy (radio and navigation assy) sends a sound signal to the rear seat audio controller
through this circuit.
The sound signal that has been sent is amplified by the stereo component amplifier assy, and then sent to
the speaker.
If there is an open or short in the circuit, sound can not be heard from the speaker even if there is no malfunc-
tion in the rear seat audio controller or speaker.
WIRING DIAGRAM
DIDAP±01

I28600
w/o Navigation System:
Radio Receiver Assy
Rear Seat Audio Controller
R±R+
ID2 15
R249
W W R19
R±R± 16
R248
W G R19
R±L+ 17
R247
W B R19
R±L± 18
R24
W
R R19
SG1 14
R2410
R196 9
8
7
106 RSR+
RSR±
RSL+
RSL±
SLD1
(Shielded)
(Shielded) ID2
ID2
ID2
ID2
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2071
2265 Author: Date:
2005 SEQUOIA (RM1146U)

I28606
Radio Receiver Assy
Wire Harness View:
R19
RSR+
RSR±
RSL+ SLD1
RSL±
I28750
Radio and Navigation Assy
Wire Harness View:
R27
R±L+
R±L±
R±R±R±R+
RSLD
I28337R±R+
Rear Seat Audio Controller
Wire Harness View:
R±R±
R±L+ SG1
R±L±
R24
DI±2072
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2266 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (Radio receiver assy / radio and navigation assy ±
Rear seat audio controller).
PREPARATION:
Disconnect the radio receiver assy or radio and navigation con-
nector and rear seat audio controller connector.
CHECK:
Measure the resistance according to the values in the table be-
low.
OK:
Symbol (Tester connection)Specified condition
R±R+ (R24±9) ± R±R+ (R27±15) (*1), RSR+ (R19±15) (*2)Below 1 W
R±R± (R24±8) ± R±R± (R27±16) (*1), RSR± (R19±16) (*2)Below 1 W
R±L+ (R24±7) ± R±L+ (R27±17) (*1), RSL+ (R19±17) (*2)Below 1 W
R±L± (R24±6) ± R±L± (R27±18) (*1), RSL± (R19±18) (*2)Below 1 W
SG1 (R24±10) ± RSLD (R27±14), SLD1 (R19±14)Below 1 W
R±R+ (R24±9) ± Body ground10 kW or higher
R±R± (R24±8) ± Body ground10 kW or higher
R±L+ (R24±7) ± Body ground10 kW or higher
R±L± (R24±6) ± Body ground10 kW or higher
SG1 (R24±10) ± Body ground10 kW or higher
*1: w/ Navigation System
*2: w/o Navigation System
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±2050).

DIDAT±01
I27728
Radio and Navigation Assy (*1)
Radio Receiver Assy (*2)
Rear Door
SpeakerSteering Pad Switch
Instrument Panel J/B

RAD NO. 2 Fuse

ECU±B Fuse

AM1 FuseEngine Room J/B

RAD NO. 1 Fuse

RAD NO. 3 Fuse
Ignition Switch
Headphone
Terminal
Front Door
Speaker and
Woofer
Stereo Component Amplifier
Multi±display
Controller
Sub±assy
*1: w/ Navigation System
*2: w/o Navigation SystemVTR TerminalDisc Player
Controller
Rear Door
Speaker
Front Door
Speaker and
Woofer
Tweeter
Television Display Assy
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2079
2273 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDAU±01
I28762
Radio and Navigation Assy
(*1)
or
Radio Receiver Assy (*2)
VTR
TerminalSpeakers Stereo Component
Amplifier Assy
Multi±display Controller
Wireless
HeadphoneDisplay Signal
Sound Signal
AVC±LAN
Headphone
Terminal
Switch AssyDisc
Player
ControllerTelevision
Display
Assy
*1: w/ Navigation System
*2: w/o Navigation System DI±2080
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
2274 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDAV±01
± DIAGNOSTICSREAR SEAT ENTERTAINMANT SYSTEM
DI±2081
2275 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. Outline

As a unique feature of Rear Seat Entertainment (RSE) system, the front and rear seat occupants can
enjoy different audio±visual modes at the same time. Thus, this system offers enhanced entertainment
to the rear seat occupants.

The rear seat occupants can control the audio±visual modes with the remote controller (switch assy),
and listen to audio by using wired or wireless headphones.

The RSE system is controlled by the multi±display controller, and the communication among the audio
head unit, rear display assembly, and DVD player is established via an AVC±LAN (Audio Visual Com-
munication±Local Area Network).
2. Function of Main Component
Television Display Assy

Displays DVD and video images in accordance with video signals from the RSE ECU.

Receives signals from the remote controller and outputs them to the RSE ECU.

Outputs audio signals to the wireless headphones in the form of infrared signals.

Displays the audio±visual control screen.

Displays the adjustment screen.

Displays the diagnosis screen.

The diagnosis screen appears when the diagnosis mode is started on the audio head unit.
Audio Head Unit
w/ Navigation system:
Radio and navigation assy
w/o Navigation system:
Radio receiver assy

Outputs audio signals to the RSE ECU and the stereo component amplifier.

Outputs a request to the RSE ECU to start the diagnosis mode.
RSE ECU (Multi±display Controller)

Processes video and audio signals from the DVD player and video player and audio signals from the
audio head unit, and outputs them to the television display assembly and headphone terminals.

Controls the distribution of the audio±visual mode to the front (audio head unit) and the rear (RSE).
Remote Controller (Switch Assy)Outputs various control signals of the RSE system to the television display assembly in the form of in-
frared signals.
Wireless Headphone

Receives the audio signals from the television display assembly in the form of infrared signals.

Volume adjustment of the wireless headphone can be done by using the volume equipped on the wire-
less headphone.
Headphone Terminal
Outputs audio signals to the wired headphones that are connected.

Adjusts the volume of the wired headphones in accordance with volume control.
VTR TerminalThis terminal is for connecting the video player's video and audio output terminals.